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        Liam Howlett <liam.howlett@oracle.com>
Subject: [PATCH 17/22] lib/test_hmm: Use vma_lookup() in dmirror_migrate()
Thread-Topic: [PATCH 17/22] lib/test_hmm: Use vma_lookup() in
 dmirror_migrate()
Thread-Index: AQHXRb3Ef6pRmxzHI06KCcftrosezg==
Date:   Mon, 10 May 2021 16:58:57 +0000
Message-ID: <20210510165839.2692974-18-Liam.Howlett@Oracle.com>
References: <20210510165839.2692974-1-Liam.Howlett@Oracle.com>
In-Reply-To: <20210510165839.2692974-1-Liam.Howlett@Oracle.com>
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Use vma_lookup() to find the VMA at a specific address.  As vma_lookup()
will return NULL if the address is not within any VMA, the start address
no longer needs to be validated.

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
 lib/test_hmm.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/test_hmm.c b/lib/test_hmm.c
index 80a78877bd93..15f2e2db77bc 100644
--- a/lib/test_hmm.c
+++ b/lib/test_hmm.c
@@ -686,9 +686,8 @@ static int dmirror_migrate(struct dmirror *dmirror,
=20
 	mmap_read_lock(mm);
 	for (addr =3D start; addr < end; addr =3D next) {
-		vma =3D find_vma(mm, addr);
-		if (!vma || addr < vma->vm_start ||
-		    !(vma->vm_flags & VM_READ)) {
+		vma =3D vma_lookup(mm, addr);
+		if (!vma || !(vma->vm_flags & VM_READ)) {
 			ret =3D -EINVAL;
 			goto out;
 		}
--=20
2.30.2